any advice on the best way to do multiple languages for Advanced PDF's. (invoices, PO etc.)

You really have to just code in the foreign language. You use if then else statements with the foreign translation. I would see if I could have different versions based on language and dynamically assign the correct form based on customer’s language preference.

@Rebecca figured as much, have done it for 2 languages now but a real pain. Do you know the proper syntax for the entity.language in the if else? Tried a couple things but never looked at the customer language preference...

I don’t. sorry I would have to play with it. Even though I have done Advanced PDF, I’m not a coder so I have to work through it everytime.